CN103746632B - A kind of low-voltage motor control system - Google Patents
A kind of low-voltage motor control system Download PDFInfo
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- CN103746632B CN103746632B CN201410036857.9A CN201410036857A CN103746632B CN 103746632 B CN103746632 B CN 103746632B CN 201410036857 A CN201410036857 A CN 201410036857A CN 103746632 B CN103746632 B CN 103746632B
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Abstract
The invention discloses a kind of low-voltage motor control system, comprise a power circuit and a ZKK control loop; Described power circuit is made up of the breaker of plastic casing connected successively from three-phase alternating-current supply A, B, C phase line, plug-in unit, an induction-motor load; Described ZKK control loop comprises one by the ZKK motor-operating mechanism of DC power supply and at least one group of closing circuit be connected with ZKK motor-operating mechanism and sub-gate circuit, and described ZKK motor-operating mechanism is for controlling combined floodgate and the separating brake of breaker of plastic casing.Breaker of plastic casing configuration motor-operating mechanism scheme is more much smaller than the space of original contactor protocols call in space requirement; The scheme of moulding shell band motor-operating mechanism not only meets original control overflow and in turn simplify secondary configuration, and in drawer, space is larger, is more conducive to proper heat reduction when equipment runs, and the long-term safety being beneficial to equipment is run.
Description
Technical field
The present invention relates to low-voltage distribution field, especially a kind of low-voltage motor control system.
Background technology
Power plant intermediate item 380V low-tension motor adopts contactor to control mostly, and generally adopt conjunction, tripping relay closing circuit and trip(ping) circuit separately, power circuit is shown in Fig. 1, and electric control loop figure refers to accompanying drawing 2; Its control loop operation principle:
A. start: control loop miniature circuit breaker DK then control loop obtains electric, if change over switch ZK switches to regard to position, ZK:3, connect between ZK:4, because of tripping relay TJ control loop be in off-state so time closing circuit in TJ close point remain unchanged, if press switch knob HA, closing relay coil obtains HJ in electric then contactor control loop and makes war closed, in contactor loop, TJ close point maintains close point (remaining unchanged because tripping relay TJ control loop is in its all contact state of off-state), now contactor coil obtains electric and action, in contactor control loop, C is made war closed, therefore contactor switching signal is maintained, event contactor can keep "on" position, normal when running in the breaker of plastic casing of contactor upper end and loop main switch be "on" position, contactor combined floodgate posterior end load obtains and electricly normally to run (if change over switch ZK switches to distant place state, ZK:1, connect between ZK:2, DCS end send out program after starting command close with HA after the same contactor C that causes finally close a floodgate and keep "on" position by self-sustaining point),
B. shut down: connect a state, if desired under stop loop, the following operation that runs through of end load realizes shutting down: if change over switch ZK switches to regard to position, ZK:3, connect between ZK:4, press trip button TA then tripping relay TJ coil obtain electric, TJ close point action in contactor coil control loop becomes and is disconnected contactor coil loop battle, contactor coil dead electricity and return (tripping operation), lower end load out of service because of dead electricity (if change over switch ZK switches to distant place state, ZK:1, connect between ZK:2, DCS end send out program after starting command close with TA after the same contactor C that causes trip, lower end load is out of service).
As mentioned above, contained by the control loop of this type of scheme, element is more, and secondary line is comparatively complicated, and motor circuit is generally installed as drawer type.Because various drawout cubicle (comprises MNSG cabinet, GCS, GCK and novel universal cabinet) breaker of plastic casing in drawer in cabinet type, once enter, outlet terminal position is relatively fixing, like this, in drawer, remaining space is very limited, if secondary component configuration is too many in drawer, close, the type selectings such as separating brake relay are slightly improper all can be caused because in drawer, element peace can not load, or all elements are difficult to proper heat reduction when to be arranged on reluctantly in drawer but to cause equipment normally to run, all very large test to life-span of components and parts and safety in utilization like this, also be that fault buries no small hidden danger in the future.So, how simplifying configuration when drawer space is very limited and realizing same control overflow is many designer's questions of common interest.
Summary of the invention
For solving the problems of the technologies described above, the object of this invention is to provide a kind of low-voltage motor control system simplifying circuit structure.
The technical solution used in the present invention is:
A kind of low-voltage motor control system, is characterized in that:
Comprise a power circuit and a ZKK control loop;
Described power circuit is made up of the breaker of plastic casing connected successively from three-phase alternating-current supply A, B, C phase line, plug-in unit, an induction-motor load;
Described ZKK control loop comprises one by the ZKK motor-operating mechanism of DC power supply and at least one group of closing circuit be connected with ZKK motor-operating mechanism and sub-gate circuit, and described ZKK motor-operating mechanism is for controlling combined floodgate and the separating brake of breaker of plastic casing.
Described closing circuit and sub-gate circuit have two groups, and one group is the closing circuit and sub-gate circuit that control on the spot, and another group is closing circuit and the sub-gate circuit of distant place control.
The described closing circuit controlled on the spot by being serially connected in the change over switch at ZKK motor-operating mechanism two ends, switch knob, travel switch, auxiliary relay normally-closed contact form; The described sub-gate circuit controlled on the spot by being serially connected in the change over switch at ZKK motor-operating mechanism two ends, opening button, auxiliary relay normally opened contact form; The closing circuit that a described distant place controls by being serially connected in the change over switch at ZKK motor-operating mechanism two ends, DCS closing switch, travel switch, auxiliary relay normally-closed contact form; The sub-gate circuit that a described distant place controls by being serially connected in the change over switch at ZKK motor-operating mechanism two ends, DCS separating brake switch, auxiliary relay normally opened contact form; The coil of described auxiliary relay and the auxiliary normally opened contact of breaker of plastic casing are connected on the positive-negative output end of described DC power supply.
Described sub-gate circuit is parallel with an off-position trip switch.
The string that the coil of described auxiliary relay and the auxiliary normally opened contact of breaker of plastic casing are formed is parallel with red light indicating circuit and green light indicating circuit, wherein, red light indicating circuit is in series by the auxiliary normally opened contact of red light and auxiliary relay, and green light indicating circuit is in series by the auxiliary normally-closed contact of green light and auxiliary relay.
The positive-negative output end of described DC power supply is provided with control switch.
Beneficial effect of the present invention:
Low-voltage motor control system of the present invention eliminates the contactor of configuration in former loop, is main switch in loop and breaker of plastic casing configuration motor-operating mechanism; This kind of scheme can simplify control loop, in former scheme (see accompanying drawing 1), closing relay HJ, separating brake relay TJ and contactor C all cancel, and breaker of plastic casing configuration motor-operating mechanism scheme is more much smaller than the space of original contactor protocols call in space requirement; The scheme of moulding shell band motor-operating mechanism not only meets original control overflow and in turn simplify secondary configuration, and in drawer, space is larger, is more conducive to proper heat reduction when equipment runs, and the long-term safety being beneficial to equipment is run.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
Fig. 1 is the power circuit schematic diagram of conventional low motor control system;
Fig. 2 is the control loop schematic diagram of conventional low motor control system;
Fig. 3 is the power circuit schematic diagram of low-voltage motor control system of the present invention;
Fig. 4 is the control loop schematic diagram of low-voltage motor control system of the present invention.
Embodiment
Shown in figure 3, Fig. 4, be a kind of low-voltage motor control system of the present invention, comprise a power circuit and a ZKK control loop;
Wherein, described power circuit is made up of the breaker of plastic casing ZKK connected successively from three-phase alternating-current supply A, B, C phase line, plug-in unit 100, an induction-motor load D, sees Fig. 3;
As shown in Figure 4, described ZKK control loop comprises a ZKK motor-operating mechanism M powered by DC power supply+KM2 ,-KM2 and at least one group of closing circuit being connected with ZKK motor-operating mechanism M and sub-gate circuit, described ZKK motor-operating mechanism M is for controlling combined floodgate and the separating brake of breaker of plastic casing ZKK, positive-negative output end+the KM2 of described DC power supply ,-KM2 are provided with control switch DK, and control switch DK is miniature circuit breaker in this example.
Described closing circuit and sub-gate circuit have two groups, and one group is the closing circuit and sub-gate circuit that control on the spot, and another group is closing circuit and the sub-gate circuit of distant place control.
The described closing circuit controlled on the spot by being serially connected in change over switch ZK, the switch knob HA of ZKK motor-operating mechanism M two ends S1, S2, travel switch YW, intermediate relay ZJ normally-closed contact form; The described sub-gate circuit controlled on the spot by being serially connected in change over switch ZK, the opening button TA of ZKK motor-operating mechanism M two ends S1, S4, intermediate relay ZJ normally opened contact forms;
The closing circuit that a described distant place controls by being serially connected in change over switch ZK, DCS closing switch of ZKK motor-operating mechanism M two ends S1, S2, travel switch YW, intermediate relay ZJ normally-closed contact form; The sub-gate circuit that a described distant place controls by being serially connected in change over switch ZK, DCS separating brake switch of ZKK motor-operating mechanism M two ends S1, S4, intermediate relay ZJ normally opened contact forms;
The coil of described intermediate relay ZJ and the auxiliary normally opened contact OF/ZKK of breaker of plastic casing ZKK are connected on the positive-negative output end of described DC power supply.
Above-mentioned sub-gate circuit is parallel with an off-position trip switch SW, implements trip signal or this loop of upper end current supply circuit connection jumping for emergency.
The string that the coil of described auxiliary relay and the auxiliary normally opened contact OF/ZKK of breaker of plastic casing ZKK are formed is parallel with red light indicating circuit and green light indicating circuit, wherein, red light indicating circuit is in series by the auxiliary normally opened contact of red light HD and intermediate relay ZJ, and green light indicating circuit is in series by the auxiliary normally-closed contact of green light LD and intermediate relay ZJ.
Its operation principle is:
A. start: when drawer is in service position, drawer travel switch YW closes, it is that in ZKK closing circuit, ZJ keeps close point state that relay ZJ wire loop access failure event ZJ contact remains unchanged, control loop miniature circuit breaker DK then control loop obtains electric, preparation "on" position is in after ZKK operating power obtains, if now change over switch ZK switches to regard to position, ZK:3, connect between ZK:4, press switch knob HA then ZKK closing circuit obtain electric and close a floodgate, because electric operation mechanism for breaker with plastics casing is mechanical self-retaining, therefore even if the rear HA that closes a floodgate resets, disconnection ZKK also can close a floodgate in self-sustaining, breaker of plastic casing combined floodgate posterior end load obtains and electricly normally to run (if change over switch ZK switches to distant place state, ZK:1, connect between ZK:2, DCS end send out program after starting command close with HA after the same breaker of plastic casing that causes close a floodgate and mechanical self-sustaining "on" position),
B. shut down: connect a state, after after ZKK closes a floodgate, in its auxiliary magnet OF and figure, OF/ZKK action becomes close point, intermediate relay ZJ coil obtains the action of electric rear ZJ auxiliary contact, in ZKK trip(ping) circuit, ZJ is made war closed, if change over switch ZK switches to regard to position, ZK:3, connect between ZK:4, press trip button TA then ZKK trip(ping) circuit obtain and electricly to trip to ZKK, lower end load out of service because of dead electricity (if change over switch ZK switches to distant place state, ZK:1, connect between ZK:2, DCS end send out program after starting command close with TA after the same breaker of plastic casing ZKK that causes trip, lower end load is out of service).
Low-voltage motor control system of the present invention eliminates the contactor of configuration in former loop, is main switch in loop and breaker of plastic casing configuration motor-operating mechanism; This kind of scheme can simplify control loop, in former scheme (see accompanying drawing 1), closing relay HJ, separating brake relay TJ and contactor C all cancel, and breaker of plastic casing configuration motor-operating mechanism scheme is more much smaller than the space of original contactor protocols call in space requirement; The scheme of moulding shell band motor-operating mechanism not only meets original control overflow and in turn simplify secondary configuration, and in drawer, space is larger, is more conducive to proper heat reduction when equipment runs, and the long-term safety being beneficial to equipment is run.This scheme drawer transformation or drawer allocatable space limited and far must control on/off switch, be used in good solution of need not frequently can yet be regarded as in start-stop loop.
The foregoing is only preferred embodiments of the present invention, the present invention is not limited to above-mentioned execution mode, as long as the technical scheme realizing the object of the invention with basic same approach all belongs within protection scope of the present invention.
Claims (4)
1. a low-voltage motor control system, is characterized in that:
Comprise a power circuit and a ZKK control loop;
Described power circuit is made up of the breaker of plastic casing connected successively from three-phase alternating-current supply A, B, C phase line, plug-in unit, an induction-motor load;
Described ZKK control loop comprises one by the ZKK motor-operating mechanism of DC power supply and at least one group of closing circuit be connected with ZKK motor-operating mechanism and sub-gate circuit, and described ZKK motor-operating mechanism is for controlling combined floodgate and the separating brake of breaker of plastic casing;
Described closing circuit and sub-gate circuit have two groups, and one group is the closing circuit and sub-gate circuit that control on the spot, and another group is closing circuit and the sub-gate circuit of distant place control; The described closing circuit controlled on the spot by being serially connected in the change over switch at ZKK motor-operating mechanism two ends, switch knob, travel switch, auxiliary relay normally-closed contact form; The described sub-gate circuit controlled on the spot by being serially connected in the change over switch at ZKK motor-operating mechanism two ends, opening button, auxiliary relay normally opened contact form; The closing circuit that a described distant place controls by being serially connected in the change over switch at ZKK motor-operating mechanism two ends, DCS closing switch, travel switch, auxiliary relay normally-closed contact form; The sub-gate circuit that a described distant place controls by being serially connected in the change over switch at ZKK motor-operating mechanism two ends, DCS separating brake switch, auxiliary relay normally opened contact form; The coil of described auxiliary relay and the auxiliary normally opened contact of breaker of plastic casing are connected on the positive-negative output end of described DC power supply.
2. a kind of low-voltage motor control system according to claim 1, is characterized in that: described sub-gate circuit is parallel with an off-position trip switch.
3. a kind of low-voltage motor control system according to claim 1, it is characterized in that: the string that the coil of described auxiliary relay and the auxiliary normally opened contact of breaker of plastic casing are formed is parallel with red light indicating circuit and green light indicating circuit, wherein, red light indicating circuit is in series by the auxiliary normally opened contact of red light and auxiliary relay, and green light indicating circuit is in series by the auxiliary normally-closed contact of green light and auxiliary relay.
4., according to the arbitrary described a kind of low-voltage motor control system of claim 1-3, it is characterized in that: the positive-negative output end of described DC power supply is provided with control switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410036857.9A CN103746632B (en) | 2014-01-24 | 2014-01-24 | A kind of low-voltage motor control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410036857.9A CN103746632B (en) | 2014-01-24 | 2014-01-24 | A kind of low-voltage motor control system |
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| CN103746632A CN103746632A (en) | 2014-04-23 |
| CN103746632B true CN103746632B (en) | 2016-02-24 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106329702A (en) * | 2015-06-24 | 2017-01-11 | 无锡阿比利德电力科技有限公司 | Dual power supply automatic switching device |
| CN106100511B (en) * | 2016-07-12 | 2018-04-03 | 东北大学设计研究院（有限公司） | A kind of control device of DCS rooms 10kV motor |
| CN112701589B (en) * | 2020-12-30 | 2022-02-08 | 上海昱章电气股份有限公司 | Circuit breaker cabinet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201044426Y (en) * | 2007-02-16 | 2008-04-02 | 长庆石油勘探局水电厂 | Water source well combination control protection cabinet |
| CN201514560U (en) * | 2009-07-24 | 2010-06-23 | 德力西电气有限公司 | Circuit of intelligent plastic case relay controller |
| CN103199614A (en) * | 2013-03-28 | 2013-07-10 | 辽宁华冶集团发展有限公司 | Two-way alternating current inlet wire and connection power distribution control method |
| CN203278710U (en) * | 2013-05-16 | 2013-11-06 | 合肥申通电力科技有限公司 | Novel magnetic control device of motor-type microcomputer |
| CN203708166U (en) * | 2014-01-24 | 2014-07-09 | 中山市明阳电器有限公司 | Low-voltage motor control system |
-
2014
- 2014-01-24 CN CN201410036857.9A patent/CN103746632B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201044426Y (en) * | 2007-02-16 | 2008-04-02 | 长庆石油勘探局水电厂 | Water source well combination control protection cabinet |
| CN201514560U (en) * | 2009-07-24 | 2010-06-23 | 德力西电气有限公司 | Circuit of intelligent plastic case relay controller |
| CN103199614A (en) * | 2013-03-28 | 2013-07-10 | 辽宁华冶集团发展有限公司 | Two-way alternating current inlet wire and connection power distribution control method |
| CN203278710U (en) * | 2013-05-16 | 2013-11-06 | 合肥申通电力科技有限公司 | Novel magnetic control device of motor-type microcomputer |
| CN203708166U (en) * | 2014-01-24 | 2014-07-09 | 中山市明阳电器有限公司 | Low-voltage motor control system |
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Effective date of registration: 20200421 Address after: 528400 No.1, Hengmen Xingye West Road, Nanlang Town, Zhongshan City, Guangdong Province Patentee after: Guangdong Mingyang Electric Co., Ltd Address before: 528437 Jiangling West Road, Torch Development Zone, Guangdong, No. 25, No. Patentee before: ZHONGSHAN MINGYANG ELECTRIC Co.,Ltd. |
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Address after: No.1, Hengmen Xingye West Road, Nanlang Town, Zhongshan City, Guangdong Province, 528400 Patentee after: Guangdong Mingyang Electric Co.,Ltd. Address before: No.1, Hengmen Xingye West Road, Nanlang Town, Zhongshan City, Guangdong Province, 528400 Patentee before: Guangdong Mingyang Electric Co.,Ltd. |
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